/* ==========================================================================
   ME体育方 · 共享站点样式 /assets/site.css
   竞技深墨绿主底 + 荧光柠檬绿数据强调 + 暖橙新手引导
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, hr { margin: 0; }

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

[hidden] { display: none !important; }

/* ---------- 2. 变量 ---------- */
:root {
  --arena: #0B2B24;
  --ink: #061A16;
  --lime: #D7FF3F;
  --lime-soft: rgba(215, 255, 63, 0.12);
  --orange: #FF9A3D;
  --cream: #F3F7EC;
  --mist: #B9C9BE;
  --celadon: #6FE3C1;
  --lemon-dark: #A8CC22;
  --paper: #FFFFFF;
  --alert: #E85D4A;

  --on-light: #0B2B24;
  --muted-light: #55705F;

  --hairline: rgba(185, 201, 190, 0.18);
  --hairline-strong: rgba(185, 201, 190, 0.34);

  --font-display: "Barlow Condensed", "Arial Narrow", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-numeric: "JetBrains Mono", "SFMono-Regular", Consolas, "Noto Sans SC", monospace;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  --shell: 1240px;
  --gutter: clamp(18px, 4vw, 48px);
  --radius-card: 24px;
  --radius-lg: 28px;
  --radius-sm: 14px;
  --radius-pill: 999px;
  --skew: 7deg;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--arena);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.05vw, 17px);
  font-weight: 400;
  line-height: 1.75;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.005em;
  color: var(--paper);
}

h1 { font-size: clamp(2.4rem, 6vw, 5.6rem); line-height: 1.02; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 1.9vw, 1.6rem); line-height: 1.28; }
h4 { font-size: 1.05rem; line-height: 1.35; }

p { line-height: 1.78; }

strong, b { font-weight: 700; color: var(--paper); }

small { font-size: 0.82em; }

a { transition: color 0.18s var(--ease); }

:focus-visible {
  outline: 3px solid var(--celadon);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: var(--lime);
  color: var(--ink);
}

/* ---------- 4. 布局工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(48px, 7vw, 96px);
}

.section--tight {
  padding-block: clamp(32px, 4.5vw, 56px);
}

.section--paper {
  background-color: var(--cream);
  color: var(--on-light);
}

.section--paper h1,
.section--paper h2,
.section--paper h3,
.section--paper h4 { color: var(--ink); }

.section--paper strong,
.section--paper b { color: var(--ink); }

.section--ink {
  background-color: var(--ink);
  color: var(--cream);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 28px);
}

.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--split-rev { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.stack > * + * { margin-top: var(--stack-gap, 16px); }

.prose {
  max-width: 68ch;
  line-height: 1.85;
}

.prose > * + * { margin-top: 1.05em; }

.prose ul,
.prose ol {
  list-style: disc;
  padding-left: 1.25em;
}

.prose ol { list-style: decimal; }

.prose li + li { margin-top: 0.45em; }

/* ---------- 5. 眉标 / 标签 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-numeric);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--celadon);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  flex: none;
  background: var(--lime);
  transform: skewX(-24deg);
}

.section--paper .eyebrow { color: #2E6B58; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(215, 255, 63, 0.35);
  background: rgba(215, 255, 63, 0.14);
  color: var(--lime);
  font-family: var(--font-numeric);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.5;
  white-space: nowrap;
}

.tag--new {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
}

.tag--data {
  background: rgba(111, 227, 193, 0.14);
  border-color: rgba(111, 227, 193, 0.36);
  color: var(--celadon);
}

.tag--muted {
  background: rgba(185, 201, 190, 0.12);
  border-color: rgba(185, 201, 190, 0.3);
  color: var(--mist);
}

.section--paper .tag {
  background: rgba(11, 43, 36, 0.07);
  border-color: rgba(11, 43, 36, 0.18);
  color: var(--arena);
}

.section--paper .tag--new {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
}

.section--paper .tag--data {
  background: rgba(17, 90, 71, 0.09);
  border-color: rgba(17, 90, 71, 0.24);
  color: #1F6B54;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease),
              color 0.2s var(--ease), border-color 0.2s var(--ease),
              box-shadow 0.2s var(--ease);
}

.btn--lime {
  background-color: var(--lime);
  color: var(--ink);
  box-shadow: 0 10px 24px rgba(215, 255, 63, 0.16);
}

.btn--lime:hover {
  background-color: #E6FF7C;
  transform: translateY(-2px);
}

.btn--orange {
  background-color: var(--orange);
  color: var(--ink);
}

.btn--orange:hover {
  background-color: #FFB066;
  transform: translateY(-2px);
}

.btn--ghost {
  background-color: transparent;
  border-color: var(--hairline-strong);
  color: var(--cream);
}

.btn--ghost:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.btn--sm {
  padding: 9px 16px;
  font-size: 14px;
}

.section--paper .btn--ghost {
  border-color: rgba(11, 43, 36, 0.28);
  color: var(--arena);
}

.section--paper .btn--ghost:hover {
  border-color: var(--arena);
  background: rgba(11, 43, 36, 0.06);
  color: var(--arena);
}

/* ---------- 7. 卡片 / 数据条带 / 表格 ---------- */
.card {
  padding: clamp(20px, 2.4vw, 30px);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  background-color: rgba(255, 255, 255, 0.04);
}

.section--paper .card {
  background-color: var(--paper);
  border-color: rgba(11, 43, 36, 0.12);
  box-shadow: 0 12px 32px rgba(11, 43, 36, 0.07);
}

.rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding-block: 14px;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.section--paper .rail {
  border-color: rgba(11, 43, 36, 0.14);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  -webkit-overflow-scrolling: touch;
}

.section--paper .table-wrap { border-color: rgba(11, 43, 36, 0.14); }

.table {
  width: 100%;
  min-width: 560px;
  font-size: 15px;
}

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--hairline);
}

.table thead th {
  background-color: rgba(6, 26, 22, 0.55);
  color: var(--celadon);
  font-family: var(--font-numeric);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.table tbody tr {
  transition: background-color 0.18s var(--ease);
}

.table tbody tr:hover { background-color: rgba(215, 255, 63, 0.08); }

.table tbody tr:last-child td { border-bottom: 0; }

.table tbody td:first-child {
  box-shadow: inset 3px 0 0 transparent;
  transition: box-shadow 0.18s var(--ease);
}

.table tbody tr:hover td:first-child {
  box-shadow: inset 3px 0 0 var(--lime);
}

.table .num {
  font-family: var(--font-numeric);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.section--paper .table th,
.section--paper .table td { border-color: rgba(11, 43, 36, 0.12); }

.section--paper .table thead th {
  background-color: rgba(11, 43, 36, 0.06);
  color: #1F6B54;
}

.section--paper .table tbody tr:hover { background-color: rgba(215, 255, 63, 0.28); }

/* ---------- 8. 图片容器基座 ---------- */
.media {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-card);
  background-color: var(--arena);
  background-image:
    linear-gradient(128deg, rgba(215, 255, 63, 0.16) 0%, rgba(111, 227, 193, 0.07) 46%, rgba(6, 26, 22, 0.92) 100%);
}

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media > img,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.media__scrim {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 26, 22, 0) 42%, rgba(6, 26, 22, 0.86) 100%);
}

.media__meta {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  font-family: var(--font-numeric);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--lime);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "›";
  color: rgba(185, 201, 190, 0.6);
  font-size: 13px;
}

.breadcrumb a { color: var(--celadon); }
.breadcrumb a:hover { color: var(--lime); }

.section--paper .breadcrumb { color: var(--muted-light); }
.section--paper .breadcrumb a { color: #1F6B54; }
.section--paper .breadcrumb a:hover { color: var(--arena); }

/* ---------- 10. 可展开组 ---------- */
[data-fold-trigger] {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 0;
  text-align: left;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
  border-bottom: 1px solid var(--hairline);
}

[data-fold-trigger]::after {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--lime);
  border-bottom: 2px solid var(--lime);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.24s var(--ease);
}

[data-fold-trigger][aria-expanded="true"]::after {
  transform: rotate(225deg) translateY(-2px);
}

[data-fold-trigger]:hover { color: var(--lime); }

.section--paper [data-fold-trigger] {
  color: var(--ink);
  border-color: rgba(11, 43, 36, 0.14);
}

.section--paper [data-fold-trigger]:hover { color: #1F6B54; }

/* ---------- 11. 滚动显现 ---------- */
.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal-ready [data-reveal="shown"] {
  opacity: 1;
  transform: none;
}

/* ---------- 12. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  top: -120px;
  left: 50%;
  z-index: 200;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 0 0 18px 18px;
  background-color: var(--lime);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: top 0.2s var(--ease);
}

.skip-link:focus-visible {
  top: 0;
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

/* ---------- 13. 页头 ---------- */
.site-header {
  position: relative;
  z-index: 90;
  border-bottom: 1px solid var(--hairline);
  background-color: var(--ink);
}

.header-utility {
  background-color: var(--arena);
  border-bottom: 1px solid var(--hairline);
}

.header-utility__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  min-height: 44px;
  padding-block: 6px;
}

.header-brandline {
  font-family: var(--font-numeric);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--celadon);
  line-height: 1.5;
}

.utility-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.utility-link {
  display: inline-flex;
  align-items: center;
  padding: 5px 13px;
  border: 1px solid rgba(185, 201, 190, 0.28);
  border-radius: var(--radius-pill);
  font-family: var(--font-numeric);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mist);
  line-height: 1.5;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}

.utility-link:hover {
  background-color: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.header-main {
  position: relative;
  background-color: var(--ink);
}

.header-main__inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 32px);
  min-height: 78px;
  padding-block: 10px;
}

/* 品牌锁定 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
  border-radius: var(--radius-sm);
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  padding-bottom: 2px;
  border-radius: 13px;
  background-color: var(--lime);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 0 0 1px rgba(215, 255, 63, 0.42);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.brand__sub {
  font-family: var(--font-numeric);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.24em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--mist);
}

/* 移动端开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 10px 15px;
  min-height: 44px;
  border: 1px solid rgba(185, 201, 190, 0.32);
  border-radius: var(--radius-pill);
  background-color: rgba(255, 255, 255, 0.03);
  color: var(--cream);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--lime);
  background-color: var(--lime-soft);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
  height: 14px;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background-color: var(--lime);
  transition: transform 0.22s var(--ease), opacity 0.16s linear;
}

.nav-toggle__label {
  font-family: var(--font-numeric);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 主导航 */
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-list__item { flex: none; }

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.4;
  color: var(--cream);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
              box-shadow 0.18s var(--ease);
}

.nav-link:hover {
  color: var(--lime);
  background-color: var(--lime-soft);
}

.nav-link[aria-current="page"] {
  color: var(--lime);
  background-color: rgba(215, 255, 63, 0.14);
  box-shadow: inset 0 0 0 1px rgba(215, 255, 63, 0.45);
  font-weight: 700;
}

.header-cta { flex: none; }

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  padding-top: clamp(44px, 6vw, 80px);
  background-color: var(--ink);
  color: var(--mist);
  border-top: 1px solid var(--hairline);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 6px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--lime) 0 2px,
    transparent 2px 14px
  );
  opacity: 0.55;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) minmax(150px, 0.85fr) minmax(260px, 1.35fr);
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(32px, 4vw, 56px);
}

.footer-brand .brand { margin-bottom: 18px; }

.footer-summary {
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.footer-heading {
  margin-bottom: 16px;
  font-family: var(--font-numeric);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.5;
  text-transform: uppercase;
  color: var(--lime);
}

.footer-nav__list li + li { margin-top: 10px; }

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.footer-link::before {
  content: "";
  width: 0;
  height: 1px;
  flex: none;
  background-color: var(--lime);
  transition: width 0.2s var(--ease);
}

.footer-link:hover { color: var(--lime); }
.footer-link:hover::before { width: 14px; }

.footer-contact__list li + li { margin-top: 14px; }

.footer-label {
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-numeric);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(185, 201, 190, 0.72);
}

.footer-value {
  display: block;
  font-size: 15px;
  line-height: 1.65;
  color: var(--cream);
}

.footer-value--mono {
  font-family: var(--font-numeric);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.footer-service-note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed rgba(185, 201, 190, 0.24);
  font-size: 13px;
  line-height: 1.75;
  color: rgba(185, 201, 190, 0.86);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 20px 28px;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  color: rgba(185, 201, 190, 0.82);
}

.footer-legal__meta {
  font-family: var(--font-numeric);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}

.footer-legal__links a {
  color: var(--mist);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-legal__links a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1100px) {
  .grid--thirds { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: minmax(220px, 1.4fr) minmax(140px, 0.8fr) minmax(230px, 1.3fr); }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .header-main__inner { min-height: 68px; }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 95;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin-left: 0;
    padding: 16px var(--gutter) 24px;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    background-color: var(--ink);
    border-top: 1px solid var(--hairline-strong);
    border-bottom: 1px solid var(--hairline);
    box-shadow: 0 24px 48px rgba(6, 26, 22, 0.55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.24s var(--ease), transform 0.24s var(--ease),
                visibility 0.24s var(--ease);
  }

  .primary-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    width: 100%;
  }

  .nav-link {
    justify-content: space-between;
    width: 100%;
    padding: 14px 18px;
    border: 1px solid rgba(185, 201, 190, 0.14);
    border-radius: 16px;
    font-size: 16px;
  }

  .header-cta {
    width: 100%;
    margin-top: 14px;
    padding-block: 14px;
    font-size: 17px;
  }

  .grid--split,
  .grid--split-rev,
  .grid--thirds,
  .grid--halves {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px;
  }

  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .header-brandline { display: none; }
  .header-utility__inner { justify-content: center; min-height: 40px; }
  .utility-nav { width: 100%; justify-content: center; }
  .utility-link { font-size: 11px; padding: 4px 10px; letter-spacing: 0.06em; }

  .brand__name { font-size: 17px; }
  .brand__mark { width: 36px; height: 36px; border-radius: 12px; font-size: 20px; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-brand { grid-column: auto; }

  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

@media (max-width: 400px) {
  .nav-toggle__label { display: none; }
  .nav-toggle { padding: 10px 12px; }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  .reveal-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .btn:hover,
  .nav-link:hover { transform: none; }
}